Coster XTA 624 - User Manual

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E 136 - XTA 624 C1 Eng.

22.11.10 AM REV. 02

We reserve the right to make changes without notice

COSTER

XTA 624 C1 Eng.

• Temperature control in air handling units

• Communication systems :

– C-Bus : XTA 624 Telemanagement optional;

to enable Telemanagement use the "C-Bus Plug-in" type ACB 400 C1 or later,

to be ordered separately as accessory.

• 24 V ~ power supply; DIN rail mounting

1. APPLICATION

XTA 624 is designed for temperature control in air handling units composed of:

• 2 hot/chilled water or vapor batteries with 3-wire modulating control

or electric batteries with 1-,2-, or 3-stage On-Off control

or direct expansion batteries with 1- or 2-stage On-Off control

• 1 air mixing unit with 0...10 V– air damper actuators

or 1 heat recuperator with 0...10 V– or On-Off control (CSV 304 converter).

The equipment can be included in a Telemanagement system through the C-Bus connection.

2. OPERATION

The main features of XTA 624 are as follows:

• Two 3-wire modulating outputs or 2-stage On-Off (two equal loads) or 3-stage (two unequal loads) outputs,

configurable for:

– room temperature control (heating or cooling) with summer external compensation if desired, minimum

and maximum flow limits to prevent cold drafts.

– flow temperature control (heating or cooling) with winter and summer compensation if desired

– pre-heating temperature control at a fixed value

• One 0...10 V– progressive output, configurable for:

– air mixing control based on temperature comparison or with minimum external air limit

– heat recuperator On-Off control according to room-external temperature comparison

• 2 pump control On-Off outputs accoring to output load

• Manual seasonal switching from a display or an external switch.

• Remote-controlled temperature setting adjustment

• Alarms for short and open detector circuits and for system and equipment malfunction.

• Programming by means of 25 24-hour programs, five 7-day programs, and 25 annual period programs

• Enabled for data transmission via C-Bus with local PCs or remote Telemanagement PC.

• Optional C-Bus transmission of data with local PCs or remote Telemanagement PC

To enable data transmission and Telemanagement use the “C-Bus Plug-in” type ACB 400 C1 or later

To communicate locally with a PC use the test Plug-in type ACX 232

3. ACCESSORIES

No. Description Type Application range Sensing Code Data

element sheet

1 Duct flow air temperature detector STA 010 0…60 °C NTC 10 k

Ω B1 –

1 Duct outside air temperature detector STA 001 –30…+40 °C NTC 1 k

Ω B2 –

or wall outside air temperature detector SAE 001 –30…+40 °C NTC 1 k

Ω B2 –

1 Duct extract air temperature detector STA 010 0…40 °C NTC 10 k

Ω B3 –

or room air temperature detector SAB 010 0…40 °C NTC 10 k

Ω B3 –

1 Duct pre-heating temperature detector STA 010 0…40 °C NTC 10 k

Ω B4 –

1 Temperature set-point adjuster CDB 100 ± 5 °C – Rt° –

1 Outside air minimum distance positioner PCS 04 – – Rs –

Accessory for Telemanagement

1 Plug-in for communicating via C-Bus

ACB 400 C1 – – –

E 136

22.11.10 AM

REV. 0

BUS

OPTIONAL

TEMPERATURE CONTROLLER FOR TWO-BATTERY

AIR HANDLING UNIT

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Summary

XTA 624 Controller Application and Operation

Controller Application Overview

Describes the controller's purpose in air handling units and its compatibility.

Key Operational Capabilities

Lists the main functions and features of the XTA 624 controller.

Available System Accessories

Lists optional accessories for the controller, such as sensors and communication modules.

Technical Data, Dimensions, and Interface

Electrical and Mechanical Specifications

Details electrical properties, mechanical data, and adjustment ranges.

Telemanagement and System Overview

Covers telemanagement capabilities and system overview.

Controller Dimensions and Facia Layout

Describes physical size and the front panel interface.

Wiring Diagrams and Procedures

Wiring Diagrams for Control Outputs

Illustrates various wiring configurations for control outputs.

Wiring Installation Guidelines

Provides instructions and best practices for wiring installation.

Device Placement and Communication Setup

Optimal Placement of Controller and Detectors

Guidance on installing components for best performance.

C-Bus and PC Communication Methods

Instructions for setting up telemanagement and local PC communication.

Temperature Control and Ys Output Examples

Temperature Control Configuration Examples

Demonstrates different temperature control scenarios.

Ys Output Application Examples

Illustrates typical uses for the Ys output.

Y1 and Y2 Output Configuration Examples

Modulating and On-Off Battery Control Examples

Shows examples for controlling batteries with Y1/Y2.

Y1 and Y2 Output Configuration Examples (Continued)

Heating, Cooling, and Preheating Output Examples

Illustrates different output functions for heating, cooling, and preheating.

Controller Operation and Temperature Control Basics

General Controller Operation

Explains the fundamental operation of the XTA 624.

Desired Temperatures and Tuning Parameters

Details setting desired temperatures and proportional/integral time.

Advanced Temperature Control Modes

Temperature Control with Single Detector

Describes control logic using room or discharge air detectors alone.

Temperature Control with Dual Detectors

Explains control logic using both room and discharge air detectors.

Operating Modes and Temperature Compensation

Selecting Controller Operating Modes

Explains the different modes the controller can operate in.

Outside Temperature Compensation Functions

Details how outside temperature affects heating and cooling setpoints.

Advanced Control Functions and Output Configuration

Summer Room Cooling Compensation

Details compensation for room cooling in summer.

Preheating Temperature Control

Explains the specific control logic for preheating.

Configuring Outputs Y1 and Y2

Describes how to set up the Y1 and Y2 outputs for various functions.

Ys Output and Season Switching Methods

Applications for the Ys Output

Covers typical uses for the Ys output, such as air dampers and recuperators.

Season Switching Methods

Explains the different ways to switch the controller's operation between seasons.

Automatic Season Switching Logic

Seasonal Switching Based on Temperature

Details automatic switching based on outside temperature thresholds.

Seasonal Switching Based on Periods

Details automatic switching based on defined season periods.

Programming and Date-Based Periods

Assigning Daily Programs

How to assign specific daily programs.

24-Hour and 7-Day Program Setup

Details creating and configuring daily and weekly programs.

Annual Periods and Season Definitions

Describes setting up annual periods and defining winter/summer seasons.

Pump Controls and Complementary Functions

M1 and M2 Pump Control Logic

Explains the control logic for pumps M1 and M2 based on output loads.

Security, Identification, and Data Display

Covers password protection, site naming, and viewing operating data.

Data Recording and Telemanagement Access

Details data storage capabilities and how to view recorded information.

Alarms and System Startup Procedures

Functional and Detector Alarms

Explains the types, reasons, and effects of functional and detector alarms.

System Startup Test Guide

Provides steps for performing an initial system startup test.

Display Navigation and Key Functions

Navigating Controller Display Pages

Explains how to scroll through and select display pages.

Key Functions for Data Adjustment

Describes the role of the controller's keys for adjusting settings.

Normal Operation Display Screens (M0)

M0 Display Item Descriptions

Details the information presented on the M0 normal use display pages.

Time, Periods, and Adjustment Settings

Time Settings and Period Configuration

Covers configuring time settings and various periods.

Controller Adjustment Parameters

Details key adjustment parameters like proportional band and integral time.

Equipment Configuration Parameters

Detector Configuration and Season Switching Settings

Covers detector setup and season switching options.

Output, Alarm, and Communication Configuration

Details configuration for outputs, alarms, and communication.

Proportional Band Multiplier Settings

Explains how to set multipliers for proportional bands.

System Testing and Output Verification

Testing Controller Outputs

Details the procedure for testing controller outputs and their status.